In which plant structure does photosynthesis primarily occur?
Question 1In which plant structure does photosynthesis primarily occur?
leaf
petiole
bark
root
stem
Question 2NADPH and ATP are used in the
noncyclic electron pathway.
cyclic electron pathway.
Calvin cycle reactions.
citric acid cycle.
light reactions.
Question 3Some herbicides inhibit the electron transport chain in the thylakoid membrane. Without the movement of electrons, hydrogen ions would not be pumped from the stroma to the thylakoid space and the hydrogen ion gradient would not be established. How would this affect the Calvin cycle reactions?
RuBP carboxylase would not function properly, so CO2 fixation would not occur.
Since the Calvin cycle reactions occur in a different part of the chloroplast, there would be no effect.
Sunlight could no longer be used by the chloroplast, but this would have no effect on the Calvin cycle reactions because they do not require light.
CO2 would not enter the cell as a result, and the Calvin cycle reactions would not occur.
ATP would not be produced and, as a result, the Calvin cycle reactions would not occur.
Question 4The “antenna” system of a plant that gathers the solar energy consists of
the ATP synthase complex.
the epidermal cells of the leaf.
the hydrogen ions (H+)
the grana.
the pigment complex.
Question 5The Calvin cycle reactions are dependent upon a supply of
glucose and carbon dioxide.
oxygen and carbon dioxide.
carbon dioxide, NADPH, and ATP.
carbon dioxide and NADPH.
water and carbon dioxide.
Question 6The H + (protons) accumulate in the thylakoid space during electron transport between photosystems I and II. The excess of protons in the thylakoid space
is small enough to diffuse back out through the lipid bilayer.
raises the pH of the space until the processes stop.
enters the photorespiration pathway.
converts NADP to NADPH and generates ATP in the process.
moves from the thylakoid space to the stroma through the ATP synthase complex.
Question 7The hydrocarbon skeleton used to form fatty acids, glycerol, and amino acids (when N is added) is derived from
cellulose.
glucose phosphate.
starch.
sucrose.
G3P.
Question 8To what does the term grana refer?
the double membrane of the chloroplast
a flattened disk or sac in the chloroplast
the cytochrome system in the membranes of the thylakoids
the central fluid-filled space of the chloroplast
a stack of thylakoid membrane structures
Question 9Which of the following statements is true concerning sunlight radiation used for photosynthesis?
All of the sunlight that hits the atmosphere is used for photosynthesis.
Only the highest energy wavelengths are used for photosynthesis.
All of the visible light is used for photosynthesis.
Only the green visible light is used for photosynthesis.
Only the red, blue, and violet wavelengths of visible light are used for photosynthesis.
Question 10Which part of photosynthesis does not occur inside the thylakoid membrane?
Calvin cycle reactions
light reactions
noncyclic electron pathway
electron transport chain
cyclic electron pathway
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